Handan Chong, Daobin Wang, Lihua Yuan, Xiaoxiao Li, Minghua Cao, Huiqin Wang. Estimation and Compensation of Integer Frequency Offset in Coherent Optical Offset Quadrature Amplitude Modulation Based Filter Bank Multicarrier Systems[J]. Acta Optica Sinica, 2019, 39(12): 1206008
- Acta Optica Sinica
- Vol. 39, Issue 12, 1206008 (2019)
Fig. 1. Wide-range frequency offset estimation method and frame structure for CO-FBMC/OQAM system. (a) Wide-range frequency offset estimation method for CO-FBMC/OQAM system; (b) frame structure of CO-FBMC/OQAM system
Fig. 2. Compositional structure of CO-FBMC/OQAM system. (a) Simulation platform of CO-FBMC/OQAM system; (b) electrical spectra of baseband signals; (c) optical spectra of baseband signals
Fig. 3. Relative estimation errors of four sequences in back-to-back (BtB) scenario
Fig. 4. BER of receiver as a function of OSNR for using random, CAZAC, and PN sequences
Fig. 5. EVM as a function of laser frequency offset (OSNR: 20 dB)
Fig. 6. EVM as a function of normalized IFO (OSNR: 20 dB)
Fig. 7. (a) BER of receiver as a function of OSNR in BtB scenario; (b)-(d) demodulation constellation charts with normalized IFO of 4 and OSNR values of 12 dB, 15 dB, and 18 dB, respectively
Fig. 8. BER of receiver as a function of OSNR after 800-km transmission
Fig. 9. Relative estimation error for proposed method and Schmidl's method
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Table 1. Design parameters of four training sequences
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